I just bought my '23 new Big Horn two months ago. After having read all those posts regarding leaking third brake light and rear window, I started paying attention to that area and underneath the rear seats. Given the fact that my truck had been sitting outdoor on dealership's lot for over a year and had no sign of leaking, I would assume for now my truck is safe. I did think about doing preventative sealing on the third brake light and the rear window, but I finally decided to leave the factory original seals alone. I haven't taken the truck to back country yet, but I do suspect offroad driving may contribute to some of the cracked rear window frames. Maybe some people didn't do enough break in period to let everything settle? I usually don't drive my truck on logging road like driving on highway like some do.